Ventilator



(No Model.)

M. H. DORGAN.

VBNTILATOR.

No. 267,741. 7 Patented Nov. 21, 1882.

n. PUERS. Hmomm n hor, Wanhington. n. c.

U ITED STATES PATENT @rrrcn.

' MICHAEL H. DORGAN, SAN FRANCISCO, CALIFORNIA,

VENTILATQR.

SPECIFICATION forming part of Letters Patent No. 267,741, dated November21, 1882.

' Application filed June 5, 1882. (No model.)

To all whom it may concern: 1

Be it known that I, MICHAEL H. DORGAN, of the city and county of SanFrancisco, State of California, have invented an Improved Ventilator;and I hereby declare the following to be a full, clear, and exactdescription thereof. My invention relates to certain im provemen ts inthat class of ventilating deviceswhichare swiveled upon the tops ofsoil-pipes, fines, &;c.; and my invention consists in a conical casingwith spaced walls opening at the frustuin into a cylindrical pipe, inwhich and in the opening of the cone is placed a double conicalplng. Thedevice is provided with a vane for keeping it in the wind and with asuitable coupling swiveling it in place, all of which will hereinafterfully appear.

The object of my invention is to provide an efficient device forventilating soil-pipes,&c., which object I gain by thefollowingconstruction, reference being made to thenccom pan yiugdrawings, in which-- 1 Figure 1 is a perspective. tudinal section.

Let A represent a hollow casing havinga conical shape. At its frustum itis connected h 2 is a longiwith a pipe, B.

0 represents a conical shell or casing, the base of which has a diameterabout equal to the casing A, and its frustum is smaller, as shown. Theshell 0 is inserted in A,the bases of both being soldered or joinedtogether. Said shell 0 thus forms the inner wall of the conical casing,and because of its construction a space, a, is formed between the two,the opening of which is in relation with the pipe B.

D is a plug consisting of two cones, the bases of which are together.This plug is smaller than the opening of the frustum of easing O, and issupported by arms d in such position that one apex extends into saidcasing and the other extends into the pipe B, leaving an annular openingbetween it and the casing and pipe B.

Into the under side of the casing A is let a pipe, E, which opens intothe space a.

F is a pipe provided with a central spindle, f.

The pipe F extends within pipe E, and its spin- 'dle passes through thewalls of casings A and O, and through the center up to the upper wallsin suitable bearings. This construction is simply a means for swivelingthe device upon pipe F, in order that by means. of a vane, G, with whichpipe B is provided, the mouth of the ventilator may be always kept inthe wind.

Let H represent a soilpipe extending from closets located and connectedsuitably therewith; Upon its top the pipe F is secured.

The operation of the device is as follows: The wind is directed withinthe wide open mouth of the conical casing, and finds a vent through theannular opening around the conical plug D. On account of theinterposition of this plug and its shape, as well as the shape of thecasing, a strong draft is produced, which is augmented by the shape ofthe rear of the plug D, so that the wind passes through withconsiderable force, and very much less wind is required to produce theeii'ect. This draft exhausts the air from the space a and ventilates thesoil pipe. The opening of the space a around the frustuins of the twocasings is free, and allows a ready exhaust and perfect ventilation ofthe soil-pipe.

Having thus described my invention, what I (311 iii] as new, and desireto secure by Letters atent, is

1. In a ventilator for soil-pipes, tines, &c., the arrangement of thespaced conical casing A O with its frustuni-openiugs, the pipe B, thedouble conical plug D in the opening of the casing, and-an inlet-pipe,E, substantially as herein described.

2. A ventilator for soil-pipes, fines, &c., consisting of the spacedconical casing A U, with its frustuiii-openings, the pipe B, with itsvane G, the double conical plug 1), the inlet-pipe E, and theswivel-pipe F, with its spindle f, all arranged and combinedsubstantially as herein described.

1n witness whereof I hereunto set my hand.

MICHAEL H. DORGAN.

